ci: add workflow for publishing extensions

Author: jokroese

.github/workflows/publish.yml

@@ -0,0 +1,46 @@
+name: Publish Extension
+
+on:
+  push:
+    tags:
+      - "v*.*.*" # Trigger on new version tags
+  workflow_dispatch:
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js with pnpm
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+          cache: "pnpm"
+
+      - name: Install dependencies
+        run: pnpm install
+
+      - name: Lint code
+        run: pnpm run lint
+
+      - name: Check types
+        run: pnpm run check-types
+
+      - name: Build the extension
+        run: pnpm run build
+
+      - name: Publish to Open VSX Registry
+        uses: HaaLeo/publish-vscode-extension@v1
+        id: publishToOpenVSX
+        with:
+          pat: ${{ secrets.OVSX_PAT }}
+
+      - name: Publish to VS Code Marketplace
+        if: secrets.VSCE_PAT != ''
+        uses: HaaLeo/publish-vscode-extension@v1
+        with:
+          pat: ${{ secrets.VSCE_PAT }}
+          registryUrl: https://marketplace.visualstudio.com
+          extensionFile: ${{ steps.publishToOpenVSX.outputs.vsixPath }}